Fault diagnosis method and system for photovoltaic module

• Main Authors: RUAN ZERONG, DENG YUN, WU SHIDONG, FAN JIACHENG
• Format: Patent
• Language: Chinese; English
• Published: 14.05.2024
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION; GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRA-REDRADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, E.G. USINGPHOTOVOLTAIC [PV] MODULES

The invention is suitable for the technical field of photovoltaic equipment diagnosis, and particularly relates to a fault diagnosis method and system for a photovoltaic module, and the method comprises the steps: constructing a photovoltaic module position matrix according to the arrangement position of the photovoltaic module; randomly selecting two groups of photovoltaic modules to be detected according to the photovoltaic module position matrix, performing on-off switching processing on the photovoltaic modules, and recording real-time generating capacity data of the DC combiner box; judging and determining a low-generating-capacity photovoltaic module, randomly selecting a group of photovoltaic modules to be detected again, performing on-off switching processing, and repeating the step; and carrying out statistics on the on-off switching times of each photovoltaic module, judging whether each photovoltaic module has a fault or not based on a statistical result, and generating a fault diagnosis result. Ac